Inductor structure determination method, storage medium, electronic equipment and program product

Abstract

The invention discloses an inductor structure determination method, a storage medium, electronic equipment and a program product, and relates to the technical field of computers, and the method comprises the following steps: firstly, obtaining design parameter data of an inductor; determining magnetic core structure data corresponding to the inductor according to the design parameter data and a preset symmetrical magnetic core shape rule; determining winding structure data corresponding to the inductor according to the design parameter data; and finally, determining the structure of the inductor based on the winding structure data and the magnetic core structure data. In this way, the symmetrical inductor structure can be obtained according to the winding structure data and the magnetic core structure data, the mode of determining the inductor structure based on the symmetrical magnetic core shape rule can make inductor inter-phase coupling more uniform, structure parameters of the inductor can be conveniently adjusted, the design time of the inductor structure is shortened, and the convenience of inductor phase number expansion is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of computer technology, and in particular to a method for determining an inductance structure, a storage medium, an electronic device, and a program product. Background Art

[0002] Multiphase coupled inductors transfer energy from one coil to another through the interaction of magnetic fields, thereby achieving signal transmission or energy conversion.

[0003] At present, in the process of determining the multi-phase inductor structure, the related technology usually designs the inductor structure based on manual experience, which may cause uneven coupling between phases and increase the design time of the inductor structure. Summary of the invention

[0004] The present disclosure provides a method for determining an inductor structure, a storage medium, an electronic device and a program product. The main purpose is to solve the problem that in the process of determining a multi-phase inductor structure in the related art, the inductor structure design is usually based on manual experience, which may cause uneven coupling between phases and increase the design time of the inductor structure.

[0005] In a first aspect, the present application provides a method for determining an inductance structure, comprising: Obtain design parameter data of the inductor; Determine the core structure data corresponding to the inductor based on the design parameter data and the preset symmetrical core shape rule; Determine the winding structure data corresponding to the inductance based on the design parameter data; Based on the winding structure data and the core structure data, the structure of the inductor is determined.

[0006] In a second aspect, the present application provides a device for determining an inductance structure, comprising: An acquisition module, configured to acquire design parameter data of the inductor; A determination module is configured to determine the magnetic core structure data corresponding to the inductor according to the design parameter data and a preset symmetrical magnetic core shape rule; A determination module is configured to determine winding structure data corresponding to the inductance according to the design parameter data; The determination module is configured to determine the structure of the inductor based on the winding structure data and the magnetic core structure data.

[0007] In a third aspect, the present application provides an inductor structure, comprising: a bottom magnetic core, a top magnetic core and a winding; The core shapes of the top core and the bottom core meet the preset symmetrical core shape rule; The winding is arranged between the top and bottom cores to form an inductor.

[0008] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method of the first aspect is implemented.

[0009] In a fifth aspect, the present application provides an electronic device, comprising a storage medium, a processor, and a computer program stored on the storage medium and executable on the processor, wherein the method of the first aspect is implemented when the processor executes the computer program.

[0010] In a sixth aspect, the present application provides a computer program product having a computer program stored thereon, which implements the method of the first aspect when the computer program is executed by a processor.

[0011] The present disclosure provides a method for determining an inductor structure, a storage medium, an electronic device, and a program product, wherein the method includes: first obtaining the design parameter data of the inductor; then determining the core structure data corresponding to the inductor based on the design parameter data and a preset symmetrical core shape rule; then determining the winding structure data corresponding to the inductor based on the design parameter data; and finally determining the structure of the inductor based on the winding structure data and the core structure data. Compared with the current prior art, the present application can generate a symmetrical core shape based on the design parameter data of the inductor and a preset symmetrical core shape rule, then determine the winding structure data and the core structure data corresponding to the inductor based on the symmetrical core shape, and finally obtain a symmetrical inductor structure based on the winding structure data and the core structure data. The method of determining the inductor structure based on the symmetrical core shape rule can make the inductor phase coupling more uniform, facilitate the adjustment of the structural parameters of the inductor, reduce the design time of the inductor structure, and increase the convenience of expanding the number of inductor phases.

[0012] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 A schematic diagram showing a flow chart of a method for determining an inductance structure provided in an embodiment of the present application; Figure 2 A schematic plan view of a four-phase coupled inductor provided in an embodiment of the present application is shown; Figure 3A schematic plan view of a six-phase coupled inductor provided in an embodiment of the present application is shown; Figure 4 A schematic plan view of a three-phase coupled inductor provided in an embodiment of the present application is shown; Figure 5 An exploded diagram of a five-phase symmetrical coupled inductor provided in an embodiment of the present application is shown; Figure 6 A schematic diagram of a multi-phase coupled inductor design process provided in an embodiment of the present application is shown; Figure 7 A schematic diagram of specific design parameters of a multi-phase inductor module provided in an embodiment of the present application is shown; Figure 8 The diagram shows a phase-coupled inductor output bus layout provided in an embodiment of the present application; Fig. 9 A schematic diagram of a modular design of a multi-phase coupled inductor (the inductor is located at the bottom) provided in an embodiment of the present application is shown; Fig.10 A schematic diagram of a modular design of a multi-phase coupled inductor (the inductor is located at the top) provided in an embodiment of the present application is shown; Fig.11 A schematic diagram of another modular design of a multi-phase coupled inductor (the inductor is located at the top) provided in an embodiment of the present application is shown; Fig.12 A schematic diagram of an inductor structure provided in an embodiment of the present application is shown; Fig.13 A schematic diagram of the magnetic core structure provided in an embodiment of the present application is shown; Fig.14 A schematic structural diagram of a device for determining an inductance structure provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] It should be noted that, in the description of this application, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0017] At present, servers need to have higher data throughput, faster computing speed and more complex workloads. The server power supply should have higher power density. The inductor is one of the core components in the design of power supplies (such as switching power supplies (such as DC-DC converters), linear power supplies, etc.). The energy storage characteristics of the inductor determine the stability and response speed of the output voltage. An unreasonable inductor design will lead to excessive voltage ripple or reduced power efficiency, reduce the dynamic response capability of the power supply, and affect the stability of the output voltage. In addition, the size of the inductor usually occupies the main space of the power supply design. An unreasonable inductor design will lead to a waste of printed circuit board (PCB) space and affect the stability of the system.

[0018] In order to adapt to the design of server racks, power supply systems are developing towards high frequency, miniaturization and modularization. By reducing the size of inductors and other components, the overall power density can be improved. Therefore, passive components such as inductors need to meet the requirements of high integration and high reliability. In server power supply, the current is large and the current quality requirements are high. A multi-phase power supply solution is required. Coupled inductors can reduce the volume of multi-phase power supply by sharing a magnetic core. The coupling of magnetic flux between phases reduces current ripple and improves power supply efficiency. By integrating inductors with other magnetic components, the power density and overall efficiency will be further improved.

[0019] In the related technology, the coupled inductor design mostly adopts a rectangular structure, which is generally not symmetrical, resulting in a large difference in the coupling inductance between the two end phases and the coupling inductance of the middle phases, and uneven coupling between phases. It needs to rely on manual experience for adjustment, which increases the difficulty of manual adjustment, and the DC impedance is high, which affects the power density and efficiency. Moreover, based on this structure, it is difficult to expand the number of inductor phases, there are few adjustable parameters, and the inductor cannot be finely customized.

[0020] In order to improve the technical problem that in the process of determining the multi-phase inductor structure in the related technology, the inductor structure design is usually based on manual experience, which may cause uneven coupling between phases and increase the design time of the inductor structure. This embodiment provides a method for determining the inductor structure, such as Figure 1 As shown, the method comprises the following steps: Step 101: Obtain design parameter data of an inductor.

[0021] In some embodiments, the design parameter data of the inductor can be obtained according to the actual inductor design requirements, such as power supply integration requirements, inductor layout method, winding layout method, etc., and then the inductor structure is designed according to the design parameter data to obtain an inductor that meets the inductor design requirements. Exemplarily, the inductor can be a multi-phase coupled inductor, and the components in the inductor can include but are not limited to the top magnetic core, the bottom magnetic core, and the winding; the design parameter data can include but are not limited to the number of phases, inductance value, floor space, switching frequency, magnetic permeability, coupling coefficient, coupling uniformity, etc.

[0022] Step 102: Determine the magnetic core structure data corresponding to the inductor according to the design parameter data and the preset symmetrical magnetic core shape rule.

[0023] In some embodiments, the symmetrical core shape rules of the magnetic core can be preset in advance. The symmetrical core shape rules can be used to generate a core shape with symmetry (such as central symmetry), and then the specific core structure data is determined based on the symmetrical core shape. This symmetrical core shape can facilitate the design of the core structure and improve the design efficiency, while balancing the coupling symmetry between the phases and improving the coupling effect of the inductor. In the design process of the actual inductor structure, the core shape of the inductor can be automatically determined based on the specific parameters in the design parameter data. For example, if the number of phases in the design parameter data is six, the shape of the core can be determined to be a regular hexagon. Among them, the core structure data can be used to determine the physical structure of the core, which may include side length, height, material, etc.

[0024] Step 103: Determine winding structure data corresponding to the inductance according to the design parameter data.

[0025] The winding structure data may include material, number of turns, wire diameter, groove angle, etc. For example, based on the design parameter data, the winding method (such as winding in the same plane, winding in different planes) and winding direction (such as clockwise, counterclockwise) of the winding can be obtained, and then the winding structure design is performed according to the selected winding method and other data to obtain the corresponding winding structure data to meet various application scenarios.

[0026] Step 104: Determine the structure of the inductor based on the winding structure data and the magnetic core structure data.

[0027] In some embodiments, the structure and material corresponding to the winding can be determined based on the winding structure data, and the structure and material corresponding to the magnetic core can be determined based on the magnetic core structure data. Then, the magnetic core and the winding can be combined to obtain the overall structure of the inductor. Then, according to the actual application scenario, it can be laid out on the PCB. Multiple inductors can be combined into a multi-phase parallel transmission structure, and the corresponding current transmission path can be designed to meet the power supply integration requirements.

[0028] Compared with the related art, the present embodiment can generate a symmetrical core shape according to the design parameter data of the inductor and the preset symmetrical core shape rule, and then determine the winding structure data and the core structure data corresponding to the inductor based on the symmetrical core shape. Finally, a symmetrical inductor structure is obtained according to the winding structure data and the core structure data. The method of determining the inductor structure based on the symmetrical core shape rule can make the inductor phase coupling more uniform, facilitate the adjustment of the structural parameters of the inductor, reduce the design time of the inductor structure, and increase the convenience of expanding the number of inductor phases.

[0029] Further, as a refinement and extension of the above-mentioned embodiment, in order to specifically illustrate the process of determining the inductor structure, optionally, step 102 may specifically include: determining the core shape corresponding to the inductor based on the number of phases in the design parameter data and the preset symmetrical core shape rule; determining the core structure data corresponding to the inductor based on the inductance value and coupling coefficient in the design parameter data and in combination with the core shape.

[0030] In some embodiments, the preset symmetrical core shape rule may include: the core shape is a central symmetrical figure; or, the core shape is a symmetrical figure; or, the core shape is a regular polygon. Exemplarily, the basic shape of the inductor can be determined according to the number of phases in the design requirements and the symmetrical core shape rule. For multi-phase inductors, the same core can be shared so that the magnetic flux paths between the inductors are as consistent as possible. Then, according to the required inductance value and coupling coefficient, the specific structural data such as the core size and material (such as ferrite) in the inductor are designed.

[0031] Optionally, the core shape corresponding to the inductor is determined based on the number of phases in the design parameter data and a preset symmetrical core shape rule, which may specifically include: determining the core shape to be a regular polygon based on the symmetrical core shape rule, and determining the number of sides of the regular polygon based on the number of phases.

[0032] For example, if the number of phases of the coupled inductor is three phases, an equilateral triangle is used as the core shape of the three-phase coupled inductor; if the number of phases of the coupled inductor is six phases, a regular hexagon is used as the core shape of the six-phase coupled inductor. In this way, the present embodiment can be extended based on any number of phases, thereby improving the coupling coefficient and symmetry of each phase of the coupled inductor, thereby improving the efficiency of power conversion, while taking into account the symmetry and simplicity of the structure, and facilitating the realization of planar layout and power module integration.

[0033] Optionally, the core structure data corresponding to the inductance is determined based on the inductance value and coupling coefficient in the design parameter data and in combination with the core shape, which may specifically include: determining the bottom area corresponding to the core based on the inductance value and the core shape; determining the first protruding area corresponding to the core based on the inductance value, the first protruding area being the edge area above the bottom area; determining the second protruding area corresponding to the core based on the coupling coefficient, the second protruding area being the center area above the bottom area; determining the core structure data based on the bottom area, the first protruding area and the second protruding area.

[0034] In some embodiments, the magnetic core may include but is not limited to a bottom area, a first protruding area, a second protruding area, etc. Among them, the bottom area may be a basic area determined according to the shape and inductance value of the magnetic core; the first protruding area is arranged above the bottom area and distributed in the upper edge area, and the shape may be an arc, so that the winding has the maximum path length to ensure a higher inductance; the second protruding area is arranged in the central area above the bottom area. Specifically, according to the design parameter data, the parameters of each area of ​​the magnetic core can be adjusted to determine the structural data of each area, and finally the magnetic core structure data of the entire magnetic core can be obtained.

[0035] In some embodiments, the effective cross-sectional area and magnetic path length of the magnetic core can be calculated based on the inductance value, number of phases, floor space and other information in the design parameter data, as well as the core material characteristics, and then the current structural data corresponding to the bottom area, the first protruding area and the second protruding area can be preliminarily obtained. Among them, the current structural data corresponding to the bottom area may include but are not limited to the side length and height, the current structural data corresponding to the first protruding area may include but are not limited to the radius and height, and the current structural data corresponding to the second protruding area may include but are not limited to the width, side length and height.

[0036] Optionally, determining the first protruding area corresponding to the magnetic core according to the inductance value may specifically include: acquiring a current inductance value corresponding to the magnetic core; and determining the first protruding area by comparing the current inductance value with the inductance value.

[0037] For example, the current inductance value corresponding to the current structural data can be calculated using an inductance calculation formula, or the inductance value of the magnetic core can be predicted using electromagnetic field simulation software, and then the difference between the current inductance value and the inductance value in the design parameter data can be calculated, and the current structural data of the first protruding area can be adjusted according to the difference, so that the adjusted inductance value is close to the inductance value in the design parameter data. For example, if the current inductance value is less than the inductance value in the design parameter data, the height of the first protruding area can be increased, or the radius of the first protruding area can be enlarged.

[0038] Optionally, determining the second protruding region corresponding to the magnetic core according to the coupling coefficient may specifically include: determining the second protruding region based on the coupling coefficient and coupling uniformity in the design parameter data, wherein the second protruding region has a centrally symmetrical structure.

[0039] Among them, the shape of the second protruding area can be a centrally symmetrical figure, and the number of side lengths is determined according to the number of phases. This balances the magnetic circuit between the phases while maintaining the central symmetry, helps shorten the magnetic circuit path between the phases, and further improves the coupling symmetry between the phases.

[0040] In some embodiments, after the current structural data of the second protruding region is preliminarily acquired based on the design parameter data, the current structural data of the second protruding region may be adjusted using the coupling coefficient and the coupling uniformity.

[0041] Optionally, based on the coupling coefficient and the coupling uniformity in the design parameter data, determining the second protruding area may specifically include: obtaining the current coupling coefficient and the current coupling uniformity corresponding to the magnetic core; determining the second protruding area by comparing the current coupling coefficient with the coupling coefficient, and the current coupling uniformity with the coupling uniformity.

[0042] Exemplarily, simulation software can be used to analyze and obtain the current coupling coefficient and the current coupling uniformity corresponding to the current structural data, or a multi-point measurement method can be used to perform multiple coupling coefficient measurements at different positions or different winding segments, and then compare the consistency of these values ​​to obtain the current coupling uniformity corresponding to the current structural data. If the coupling coefficients of all measurement points are close, it means that the coupling uniformity is high. Then compare the current coupling coefficient with the coupling coefficient, and the current coupling uniformity with the coupling uniformity, and adjust the structural data of the second protruding area.

[0043] Optionally, the core structure data is determined based on the bottom area, the first protruding area and the second protruding area, which may specifically include: determining the vertex position of the second protruding area according to the phase number; determining the core structure data based on the bottom area, the first protruding area and the second protruding area, and combining the vertex position of the second protruding area.

[0044] Exemplarily, the pointing direction of each vertex of the second protruding area can be determined according to the parity of the phase number, the position coordinates of each vertex can be determined according to the direction, and the core structure data of the entire core can be obtained by combining the bottom area and the first protruding area.

[0045] Optionally, the vertex position of the second protruding area is determined according to the phase number, which may specifically include: if the phase number is an odd number, the vertex position of the second protruding area is determined according to the midpoint of the side length of the bottom area; if the phase number is an even number, the vertex position of the second protruding area is determined according to the vertex of the bottom area.

[0046] For example, based on the number of inductor phases, it can be divided into two cases: odd phases and even phases. When the number of inductor phases is odd, the vertices of the second protruding area and the midpoints of the opposite sides of the bottom area are arranged on the same straight line; when the number of inductor phases is even, the vertices of the second protruding area and the vertices of the bottom area are arranged on the same straight line, such as Figure 2 , 3 As shown, planar schematic diagrams of four-phase and six-phase coupled inductors are shown respectively.

[0047] Optionally, step 103 may specifically include: determining winding structure data corresponding to the inductance according to the inductance value and DC resistance impedance requirements in the design parameter data.

[0048] The winding structure data may include but are not limited to material, number of turns, wire diameter, groove angle, etc., and the DC resistance impedance requirement may refer to the requirement for the resistance value presented by the inductor to the DC current passing through its winding under its working conditions. Exemplarily, based on the inductance value and the resistance corresponding to the DC resistance impedance requirement, the material of the winding, such as copper wire, is selected, and then the winding structure data of the winding is determined in combination with factors such as the resistivity of the material and the winding method of the winding.

[0049] Optionally, the winding structure data corresponding to the inductance is determined based on the inductance value and DC resistance impedance requirements in the design parameter data, which may specifically include: determining the winding layout area in the magnetic core based on the magnetic core structure data; determining the winding structure data based on the inductance value and DC resistance impedance requirements and in combination with the winding layout area.

[0050] In some embodiments, the winding arrangement may include but is not limited to same-side arrangement and different-side arrangement, which can be selected according to the power supply mode, so as to form a power module based on the horizontal direction or the vertical direction, and realize the flow of current in the horizontal direction or the vertical direction, so as to facilitate the design of the power module. Among them, the same-side arrangement may refer to the copper wire inlet and outlet being on the same side, that is, the same plane, which is convenient for horizontal layout, and the different-side arrangement may refer to the copper wire inlet and outlet being on different sides, that is, different planes, which is convenient for vertical layout. The shape of the winding arrangement area (such as the copper wire arrangement area) may include but is not limited to a rectangle, an arc, etc., which can be selected and designed according to the DC resistance impedance requirements and the PCB welding requirements. For example, Figure 4As shown, a plan schematic diagram of a three-phase coupled inductor is shown, including a bottom core view and a top core view of the three-phase coupled inductor. The bottom core may include a first protruding area (core protruding area 1), a second protruding area (core protruding area 2), and a copper wire layout area. The copper wire layout area includes a layout area 1 opening, a layout area 2 opening, and a layout area 3 opening. The core protruding area 1 is arc-shaped to ensure that the winding (which can be called copper wire, coil, copper coil) has a maximum path length to ensure a higher inductance. The core protruding area 2 is located at the center of the core and has a centrally symmetrical structure, which can shorten the magnetic circuit path from phase A to phase BC, thereby improving the inductance and the phase-to-phase coupling coefficient, and at the same time has the function of balancing the magnetic circuits of each phase.

[0051] Specifically, when the same-side arrangement is adopted, the copper wire can enter from the opening of the arrangement area 1, and be led out from the opening of the arrangement area 2 after winding around the core protruding area 1. The other phase windings are arranged in the same way, so that the copper wire entrances and exits are located in the same plane, which is convenient for module design in the horizontal direction. In addition, when the opposite-side arrangement is adopted, the copper wire can enter from the opening of the arrangement area 1, and be led out from the opening of the top arrangement area 3 after winding around the core protruding area 1. The other phase windings are arranged in the same way, so that the copper wire entrances and exits are located in different planes, that is, the copper wire enters from the bottom and is led out from the top, which is convenient for module design in the vertical direction. Accordingly, the copper wire can be uniformly wound clockwise or counterclockwise along the core protruding area 1, so that the magnetic flux is emitted from the core protruding area 1 of a certain phase, and after being transmitted through the core, it will enter the core protruding area of ​​other phases in the reverse direction, thereby realizing reverse coupling.

[0052] Optionally, the core structure data of the bottom core of the inductor can be determined based on the design parameter data and the preset symmetrical core shape rules; determine whether the bottom core of the inductor is symmetrical with the top core of the inductor; if the bottom core of the inductor is symmetrical with the top core of the inductor, determine that the core structure data corresponding to the top core of the inductor is the same as the core structure data corresponding to the bottom core of the inductor; if the bottom core of the inductor is asymmetrical with the top core of the inductor, determine the core structure data corresponding to the top core of the inductor based on the bottom area of ​​the bottom core of the inductor; based on the core structure data corresponding to the bottom core of the inductor and the core structure data corresponding to the top core of the inductor, determine the core structure data corresponding to the inductor.

[0053] In some embodiments, the magnetic core of the multi-phase inductor may include a bottom magnetic core of the inductor and a top magnetic core of the inductor. The bottom magnetic core of the inductor is buckled with the top magnetic core of the inductor for use, and a multi-phase winding is placed between the two magnetic cores to form a multi-phase inductor. If the top magnetic core is symmetrical with the bottom magnetic core, the bottom magnetic core is an equilateral triangle with a protruding area, and the top magnetic core is also an equilateral triangle with a protruding area; if the top magnetic core is asymmetrical with the bottom magnetic core, the plane structure corresponding to the bottom area of ​​the bottom magnetic core can be determined as the structure of the top magnetic core, for example, if the bottom magnetic core is an equilateral triangle with a protruding area, the top magnetic core is an equilateral triangle without a protruding area, and can be a relatively thin complete iron core plane.

[0054] For example, Figure 5 As shown, an exploded view of a five-phase symmetrical coupled inductor is shown. When the core material is ferrite, it can be called an iron core. The inductor includes a top core, a bottom core, and a multi-phase winding. The structures of the top core and the bottom core are symmetrical, both of which include a core protruding area 1 and a core protruding area 2. The copper coil is wound on the opposite sides, and the copper wire arrangement area is an arc-shaped groove, that is, the current enters the core protruding area 1 from the bottom of the inductor and then passes through the top of the inductor. This form is more conducive to modular power supply. For clear display, only two-phase windings are shown in the figure, and the core protruding area 2 is not shown.

[0055] It should be noted that the number of phases of the inductor, the copper coil winding method, the buckling method of the top magnetic core and the bottom iron core, and the copper wire arrangement area can be arbitrarily selected to form inductors of different structures.

[0056] As a possible implementation, Figure 6 As shown, the following steps may be included: 1) Determine the core shape according to the number of coupled inductor phases X, and select a regular X-gonal structure for the X phase; 2) Determine the side length l and height h1 according to the required inductance value L, number of phases X, etc., such as Figure 7 As shown; 3) Determine the coil material, number of turns N, wire diameter d, groove angle α and other parameters according to the direct current resistance (DCR) requirements and inductance value; 4) Select appropriate core material according to the power switching frequency and magnetic permeability; 5) Select the appropriate radius r and height h2 of the protruding area 1 of the core, and fine-tune the inductance value to achieve the required precise inductance value; 6) Design appropriate side length m, width n and height h3 of the core protruding area 2 to adjust the coupling coefficient between phases and the coupling uniformity of each phase, so that the adjusted inductance achieves the expected coupling effect.

[0057] In this way, the structural design of the multi-phase symmetrical reverse-coupled inductor is realized, which can achieve a high degree of integration and enable the integrated design of the multi-phase Buck step-down circuit, thereby increasing the power density and improving the efficiency. It is suitable for planar layout and vertical layout, and is convenient for the design of the power module.

[0058] For example, the inductor can be arranged in a planar layout, with the inlet and outlet of the inductor coil located on the same side, so that the current flows in the horizontal direction. Figure 8As shown, the output bus layout of the four-phase inductor is shown. Multiple four-phase coupled inductors form a multi-phase parallel output. The voltage input lines are connected from both sides of the inductor. The horizontal lines from the center of each inductor form the output bus. The output bus can be treated with thicker copper cladding, thereby greatly reducing the loss of the current path.

[0059] Accordingly, during the integration of the power module, the power module can be formed in the horizontal direction or the vertical direction to realize the flow of current in the horizontal direction or the vertical direction. Specifically, there are two forms of inductor integration of the power module, one is that the inductor is located at the bottom of the power module, and the other is that the inductor is located at the top of the power module.

[0060] For example, Fig. 9 As shown, the power module can adopt the structure of PCB-inductor-field effect transistor (Metal-Oxide-Semiconductor, MOS). The MOS tube is located at the top of the multi-phase coupled inductor. Since the MOS tube needs to be soldered to the PCB, it is necessary to add a top PCB on the top of the multi-phase coupled inductor to transmit current and signals. The current input is further transmitted from the bottom PCB to the top PCB and enters the MOS tube. Then the current returns from the top PCB to the bottom PCB through the transmission line and further flows into the inductor. The inductor output current is also located at the bottom PCB, and the inductor current flows inside the same PCB. In this way, the MOS tube can be placed at the top of the module, and the heat sink can be directly installed on the top of the MOS tube, which is conducive to the overall heat dissipation of the device from the top. The overall structure of the module is relatively simple to implement, which improves the module integration efficiency.

[0061] For example, Fig.10 As shown, the power module can adopt the structure of PCB-MOS tube-inductor, with the multi-phase coupled inductor placed on the top of the module, the MOS tube located below the multi-phase coupled inductor, and the bottom PCB as the carrier, without the need for a top PCB. The current is directly transmitted from the bottom PCB and the MOS tube to the bottom of the inductor, and the output current flows out from the top of the inductor, converges through the output bus and is finally transmitted back to the bottom PCB board. Since the MOS tube is directly soldered to the bottom PCB, the heat can be conducted to the bottom of the PCB through the thermal vias. Adding a heat sink at the bottom can transfer the heat and achieve heat dissipation of the device from the bottom of the PCB. In addition, the current transmission path flows in an orderly manner, and there is no need to add round-trip transmission lines, which simplifies the module integration structure and reduces the module integration cost.

[0062] For example, Fig.11 As shown, a vertical power supply structure can be used, based on Fig.10The structure in can realize the design of vertical power supply module. Since the vertical power supply will occupy the position on the back of the chip, the position of the original filter capacitor on the back of the chip will be compressed. It is necessary to integrate some capacitors into the module and embed the capacitors into the PCB board to further reduce the module volume. The MOS tube is located below the multi-phase coupled inductor and uses the bottom PCB as a carrier. The heat can be conducted to the bottom of the PCB through the thermal conductive vias. The heat can be transferred out by adding a heat sink at the bottom. This structure cancels the output bus, and the current does not need to return to the PCB. It can directly power the GPU, CPU, and integrated circuit chips (Application Specific Integrated Circuit, ASIC) from the vertical direction through the motherboard, shortening the power supply path, reducing losses, and improving the dynamic response of the power module. In this way, magnetic integration and heat dissipation design in the vertical direction are realized, and the efficiency and integration of the power module design are improved.

[0063] Compared with the current existing technology, the power module based on the multi-phase symmetrical coupled inductor design in this embodiment gets rid of the limitation of the inductor on the shape of the power module, the module structure design is flexible and changeable, and the integration is higher. The magnetic core adopts a central symmetrical structure, and the phases are reversely coupled to achieve highly uniform coupling between the phases, which is convenient for expansion when the number of phases increases, and can realize three-phase, four-phase, five-phase, six-phase or even more coupled inductor integrated design. By sharing the magnetic core between the phases, the efficiency is maintained while saving the inductor volume and improving the power density. The magnetic core increases the first protruding area and the second protruding area, which can balance the magnetic circuit between the phases while maintaining the central symmetry, further improving the coupling symmetry between the phases.

[0064] This embodiment provides an inductor structure, such as Fig.12 As shown, the structure includes: a bottom magnetic core 11, a top magnetic core 12 and a winding 13; the core shapes of the top magnetic core 12 and the bottom magnetic core 11 meet the preset symmetrical core shape rule; the winding 13 is arranged between the top magnetic core 12 and the bottom magnetic core 11 to form an inductor.

[0065] Among them, multiple windings 13 can be arranged between the top magnetic core 12 and the bottom magnetic core 11 according to the number of phases in the design parameter data of the inductor. The top magnetic core 12 and the bottom magnetic core 11 are buckled together to form a multi-phase coupled inductor. This symmetrical magnetic core shape can make the inductor phase coupling more uniform, facilitate the adjustment of the structural parameters of the inductor, reduce the design time of the inductor structure, and increase the convenience of expanding the number of inductor phases.

[0066] Optionally, the bottom magnetic core 11 may include a bottom area 111, a first protruding area 112, a second protruding area 113 and a winding arrangement area 114; the bottom area 111 is located at the bottom of the top magnetic core 12, the number of sides of the bottom area 111 is consistent with the number of inductance phases, and is centrally symmetrical; the first protruding area 112 is distributed in the edge area above the bottom area 111, and is in an arc shape; the second protruding area 113 is located in the central area above the bottom area 111, and is centrally symmetrical; the winding 13 arrangement area is located in the bottom area 111, and matches the shape of the winding 13.

[0067] Exemplarily, if the number of phases of the coupled inductor is three-phase, an equilateral triangle is used as the core shape of the three-phase coupled inductor, that is, the shape of the bottom area 111 of the bottom magnetic core 11; a first protruding area 112 can be added above the bottom area 111 according to the number of phases, distributed in the edge area of ​​the bottom area 111, and is in an arc shape, so as to facilitate the adjustment of the inductance value; a second protruding area 113 can be added above the bottom area 111 according to the number of phases, so as to facilitate the adjustment of the coupling coefficient and coupling uniformity of the inductor, and is a centrally symmetrical figure; the winding arrangement area 114 can be located in the bottom area 111, in the form of a rectangular or arc-shaped groove, and is selected according to the arrangement of the winding 13, for example: same-side arrangement, opposite-side arrangement, to match the shape of the winding 13, so that the top magnetic core can be buckled with the bottom magnetic core 11.

[0068] Optionally, the vertex position of the second protruding area 113 is on the same straight line as the midpoint of the bottom edge of the bottom area 111 ; or, the vertex position of the second protruding area 113 is on the same straight line as the vertex of the bottom area 111 .

[0069] Exemplarily, when the number of inductance phases is an odd number, the vertices of the second protruding area 113 and the midpoints of the opposite sides of the bottom area 111 can be arranged on the same straight line; when the number of inductance phases is an even number, the vertices of the second protruding area 113 and the vertices of the bottom area 111 can be arranged on the same straight line.

[0070] Optionally, the top magnetic core 12 adopts a symmetrical structure, which is the same as the structure of the bottom magnetic core 11 ; or, the top magnetic core 12 adopts a planar structure, which is the same as the structure of the bottom area 111 of the bottom magnetic core 11 .

[0071] Optionally, the core structure of the top core 12 can be determined based on the design parameter data of the inductor and the preset symmetrical core shape rules. A symmetrical structure can be adopted, that is, the structure is consistent with that of the bottom core 11, or a planar structure can be adopted, and the bottom region 111 of the bottom core 11 has the same structure and does not have a protruding area. Exemplarily, if a symmetrical structure is adopted, the bottom core 11 is an equilateral triangle with a protruding area, and the top core 12 is also an equilateral triangle with a protruding area; if a planar structure is adopted, the bottom core 11 is a regular quadrilateral with a protruding area, and the top core 12 is a regular quadrilateral without a protruding area, and can be a relatively thin complete iron core plane, such as Fig.13 As shown, the copper coil is wound on the same side, and the copper wire arrangement area is a rectangular area, that is, the current enters the inductor from the bottom, goes around the first protruding area 112, and then passes out from the bottom of the inductor. This form is more conducive to power supply on the same plane. For clear display, the second protruding area 113 is not shown in the figure.

[0072] It should be noted that the number of phases of the inductor, the copper coil winding method, the buckling method of the top core and the bottom core, and the copper wire layout area can be arbitrarily selected to form inductors of different structures. In this way, various inductor design requirements and application requirements can be met, and the coupling uniformity of multi-phase inductors can be improved.

[0073] The embodiment of the present application also provides a device for determining an inductance structure, as Figure 1 The specific implementation of the method shown is as follows Fig.14 As shown, the device includes: an acquisition module 31 and a determination module 32.

[0074] An acquisition module 31 is configured to acquire design parameter data of an inductor; A determination module 32 is configured to determine the magnetic core structure data corresponding to the inductor according to the design parameter data and a preset symmetrical magnetic core shape rule; The determination module 32 is configured to determine winding structure data corresponding to the inductance according to the design parameter data; The determination module 32 is configured to determine the structure of the inductor based on the winding structure data and the magnetic core structure data.

[0075] In some examples of this embodiment, the determination module 32 is specifically configured to determine the core shape corresponding to the inductance based on the number of phases in the design parameter data and the preset symmetrical core shape rule; determine the core structure data corresponding to the inductance based on the inductance value and coupling coefficient in the design parameter data and in combination with the core shape.

[0076] In some examples of this embodiment, the determination module 32 is further configured to determine that the shape of the magnetic core is a regular polygon according to a symmetrical magnetic core shape rule, and determine the number of sides of the regular polygon according to the number of phases.

[0077] In some examples of the present embodiment, the determination module 32 is specifically configured to determine the bottom area corresponding to the magnetic core based on the inductance value and the magnetic core shape; determine the first protruding area corresponding to the magnetic core based on the inductance value, and the first protruding area is the edge area above the bottom area; determine the second protruding area corresponding to the magnetic core based on the coupling coefficient, and the second protruding area is the center area above the bottom area; determine the magnetic core structure data based on the bottom area, the first protruding area and the second protruding area.

[0078] In some examples of this embodiment, the determination module 32 is further configured to obtain a current inductance value corresponding to the magnetic core; By comparing the current inductance value with the inductance value, the first protruding area is determined.

[0079] In some examples of this embodiment, the determination module 32 is specifically configured to determine the second protruding area based on the coupling coefficient and the coupling uniformity in the design parameter data, and the second protruding area is a centrally symmetrical structure.

[0080] In some examples of this embodiment, the determination module 32 is specifically configured to obtain a current coupling coefficient and a current coupling uniformity corresponding to the magnetic core; and determine the second protruding area by comparing the current coupling coefficient with the coupling coefficient, and the current coupling uniformity with the coupling uniformity.

[0081] In some examples of this embodiment, the determination module 32 is specifically configured to determine the vertex position of the second protruding area according to the phase number; determine the core structure data based on the bottom area, the first protruding area and the second protruding area, and in combination with the vertex position of the second protruding area.

[0082] In some examples of this embodiment, the determination module 32 is specifically configured to determine the vertex position of the second protruding area according to the midpoint of the side length of the bottom area if the phase number is an odd number; if the phase number is an even number, determine the vertex position of the second protruding area according to the vertex of the bottom area.

[0083] In some examples of this embodiment, the determination module 32 is specifically configured to determine the winding structure data corresponding to the inductance according to the inductance value and the DC resistance impedance requirement in the design parameter data.

[0084] In some examples of this embodiment, the determination module 32 is specifically configured to determine the winding arrangement area in the magnetic core according to the magnetic core structure data; determine the winding structure data according to the inductance value and DC resistance impedance requirements and in combination with the winding arrangement area.

[0085] In some examples of the present embodiment, the determination module 32 is specifically configured to determine the core structure data of the bottom core of the inductor based on the design parameter data and the preset symmetrical core shape rule; determine whether the bottom core of the inductor is symmetrical with the top core of the inductor; if the bottom core of the inductor is symmetrical with the top core of the inductor, determine that the core structure data corresponding to the top core of the inductor is the same as the core structure data corresponding to the bottom core of the inductor; if the bottom core of the inductor is asymmetrical with the top core of the inductor, determine the core structure data corresponding to the top core of the inductor according to the bottom area of ​​the bottom core of the inductor; based on the core structure data corresponding to the bottom core of the inductor and the core structure data corresponding to the top core of the inductor, determine the core structure data corresponding to the inductor.

[0086] It should be noted that for other corresponding descriptions of the functional units involved in the device for determining an inductance structure provided in this embodiment, reference can be made to Figure 1 The corresponding description in will not be repeated here.

[0087] Based on the above Figure 1 The method shown in the embodiment also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned Figure 1 The method shown.

[0088] Based on the above Figure 1 The method shown in the embodiment also provides a computer program product, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned Figure 1 The method shown.

[0089] Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of the present application.

[0090] Based on the above Figure 1 The method shown, and Fig.14 In order to achieve the above-mentioned purpose, the embodiment of the present application also provides an electronic device, such as a personal computer, a server, which includes a storage medium and a processor; the storage medium is used to store a computer program; the processor is used to execute the computer program to achieve the above-mentioned Figure 1 The method shown.

[0091] In some embodiments, the above-mentioned physical device may also include a user interface, a network interface, a camera, a radio frequency (RF) circuit, a sensor, an audio circuit, a WI-FI module, etc. The user interface may include a display, an input unit such as a keyboard, etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may include a standard wired interface, a wireless interface (such as a WI-FI interface), etc. in some embodiments.

[0092] Those skilled in the art will appreciate that the above-mentioned physical device structure provided in this embodiment does not constitute a limitation on the physical device, and may include more or fewer components, or a combination of certain components, or different arrangements of components.

[0093] The storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the above-mentioned physical device, and supports the operation of the information processing program and other software and / or programs. The network communication module is used to realize the communication between the components inside the storage medium, and the communication with other hardware and software in the information processing physical device.

[0094] Through the description of the above implementation methods, the technical personnel in this field can clearly understand that the present application can be implemented by means of software plus the necessary general hardware platform, or by hardware. By applying the scheme of this embodiment, compared with the current prior art, the power module based on the multi-phase symmetrical coupled inductor design in this embodiment gets rid of the limitation of the inductor on the shape of the power module, the module structure design is flexible and changeable, and the integration is higher. The magnetic core adopts a central symmetrical structure, and the phases are reversely coupled, so as to achieve highly uniform coupling between the phases, which is convenient for expansion when the number of phases increases, and can realize the integrated design of coupled inductors with three phases, four phases, five phases, six phases and even more phases. By sharing the magnetic core between the phases, the efficiency is maintained while saving the inductor volume, and the power density is improved. In addition, the magnetic core increases the first protruding area and the second protruding area, which can balance the magnetic circuit between the phases while maintaining the central symmetry, and further improve the coupling symmetry between the phases.

[0095] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0096] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.

Claims

1. A method for determining an inductance structure, characterized in that: include: Obtain design parameter data of the inductor; Determining the magnetic core structure data corresponding to the inductor according to the design parameter data and a preset symmetrical magnetic core shape rule; Determining winding structure data corresponding to the inductor according to the design parameter data; The structure of the inductor is determined based on the winding structure data and the magnetic core structure data.

2. The method according to claim 1, characterized in that Determining the magnetic core structure data corresponding to the inductor according to the design parameter data and a preset symmetrical magnetic core shape rule includes: Determining a magnetic core shape corresponding to the inductor according to the number of phases in the design parameter data and a preset symmetrical magnetic core shape rule; According to the inductance value and the coupling coefficient in the design parameter data and in combination with the magnetic core shape, the magnetic core structure data corresponding to the inductance is determined.

3. The method according to claim 2, characterized in that The determining the magnetic core shape corresponding to the inductor according to the number of phases in the design parameter data and a preset symmetrical magnetic core shape rule comprises: The shape of the magnetic core is determined to be a regular polygon according to the symmetrical magnetic core shape rule, and the number of sides of the regular polygon is determined according to the number of phases.

4. The method according to claim 2, characterized in that: Determining the magnetic core structure data corresponding to the inductance according to the inductance value and the coupling coefficient in the design parameter data and in combination with the magnetic core shape includes: Determining a bottom area corresponding to the magnetic core according to the inductance value and the shape of the magnetic core; Determine a first protruding area corresponding to the magnetic core according to the inductance value, wherein the first protruding area is an edge area above the bottom area; Determine a second protruding area corresponding to the magnetic core according to the coupling coefficient, where the second protruding area is a central area above the bottom area; The core structure data is determined based on the bottom region, the first protruding region, and the second protruding region.

5. The method according to claim 4, characterized in that The step of determining the first protruding area corresponding to the magnetic core according to the inductance value includes: Get the current inductance value corresponding to the magnetic core; The first protruding area is determined by comparing the current inductance value with the inductance value.

6. The method according to claim 4, characterized in that The step of determining the second protruding area corresponding to the magnetic core according to the coupling coefficient includes: Based on the coupling coefficient and the coupling uniformity in the design parameter data, the second protruding area is determined, and the second protruding area has a central symmetrical structure.

7. The method according to claim 6, characterized in that The determining the second protruding area based on the coupling coefficient and the coupling uniformity in the design parameter data comprises: Obtain the current coupling coefficient and current coupling uniformity corresponding to the magnetic core; The second protruding area is determined by comparing the current coupling coefficient with the coupling coefficient, and the current coupling uniformity with the coupling uniformity.

8. The method according to claim 4, characterized in that The determining the magnetic core structure data based on the bottom area, the first protruding area, and the second protruding area includes: determining a vertex position of the second protruding area according to the phase number; The magnetic core structure data is determined based on the bottom area, the first protruding area, and the second protruding area in combination with the vertex position of the second protruding area.

9. The method according to claim 8, characterized in that Determining the vertex position of the second protruding area according to the phase number includes: If the phase number is an odd number, determining the vertex position of the second protruding area according to the midpoint of the side length of the bottom area; If the phase number is an even number, the vertex position of the second protruding area is determined according to the vertex of the bottom area.

10. The method according to claim 1, characterized in that Determining the winding structure data corresponding to the inductor according to the design parameter data includes: The winding structure data corresponding to the inductance is determined according to the inductance value and the DC resistance impedance requirement in the design parameter data.

11. The method according to claim 10, characterized in that The step of determining winding structure data corresponding to the inductance according to the inductance value and DC resistance impedance requirement in the design parameter data includes: Determining a winding arrangement area in the magnetic core according to the magnetic core structure data; The winding structure data is determined according to the inductance value and DC resistance impedance requirements and in combination with the winding arrangement area.

12. An inductor structure, characterized in that: include: Bottom core, top core and windings; The magnetic core shapes of the top magnetic core and the bottom magnetic core satisfy a preset symmetrical magnetic core shape rule; The winding is arranged between the top magnetic core and the bottom magnetic core to form an inductor.

13. The structure according to claim 12, characterized in that The bottom magnetic core comprises a bottom region, a first protruding region, a second protruding region and a winding arrangement region; The bottom region is located at the bottom of the top magnetic core, the number of sides of the bottom region is the same as the number of inductor phases, and is centrally symmetrical; The first protruding area is located in the edge area above the bottom area and is in an arc shape; The second protruding area is located in the central area above the bottom area and is centrally symmetrical; The winding arrangement area is located in the bottom area and matches the shape of the winding.

14. The structure according to claim 13, characterized in that The vertex position of the second protruding area is on the same straight line as the midpoint of the bottom edge of the bottom area; or, The vertex position of the second protruding area is on the same straight line as the vertex of the bottom area.

15. The structure according to claim 12, characterized in that The top magnetic core adopts a symmetrical structure, which is the same as the structure of the bottom magnetic core; or, The top magnetic core adopts a planar structure, which is the same as the bottom area structure of the bottom magnetic core.

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